Read Sharp XE-A212 Service Manual online
XE-A212V
HARDWARE DESCRIPTION
– 6 –
CHAPTER 4. HARDWARE DESCRIPTION
1. BLOCK DIAGRAM
XE-A212V
CPU
MITSUBISHI M30620SAFP
(INTERNAL RAM 10KB)
EXTERNAL MEMORY
SRAM
512KB
FLASH ROM
512KB
SHARP LH28F004BVT
PRINTER
M-T53
II
RS-232
1ch
2. MEMORY MAP
2-1. ADDRESS MAP
2-2. EXTERNAL BUS
VH (8V)
VLED (5.7V)
VCC
VDD
VDRW (+23.8V)
VLMP (4.3V)
RS-232
CH1
EPROM
PRINTER
CPU
RAM 10k BYTE
A0~19
D0~7
DRIVER, SENSOR
FRONT
2Line
LCD
KEY
&
SW
DRAWER1
/S0
9
DIG DRV
SEG DRV
KR0
KR7
BZ
12MHz
HC245
HC374
32.768kHz
HC375
HC245
4 to 16
Decoder
KR0
KR11
FROM
SRAM2
SRAM1
GAL
BR0~2
/CS0
/CS1,/CS2
HC
138
HIN
211
Pop up
LCD
HIN
211
Pop
up
7deg
LED
HC245
CH2
External BUS ACCESS SPEED
SRAM/EPROM/FLASH ROM ; 2 BCLK
External I/O ; 2 BCLK
*
1BCLK = 83.3ns (at 12MHz)
SRAM
/CS2 area:
/CS1 area BANK 0, 2:
/CS0 area BANK 0:
/CS1 area BANK 0, 2:
/CS0 area BANK 0:
address 08000h ~ 27FFFh 128KB
address 28000h ~ 2FFFFh 32KB x 2
address 30000h ~ 3FFFFh 64KB
address 40000h ~ 7FFFFh 256KB
address 28000h ~ 2FFFFh 32KB x 2
address 30000h ~ 3FFFFh 64KB
address 40000h ~ 7FFFFh 256KB
Reserve /CS0 area BANK 4, 5:
address 40000h ~ 7FFFFh 256KB x 2
FLASH
ROM
ROM
/CS0 area BANK 0
address 80000h ~ FFFFFh 256KB
(Moves to Bank 1 when
rewritten using EPROM)
(Moves to Bank 1 when
rewritten using EPROM)
Reserve /CS0 area BANK 6:
address 80000h ~ FFFFFh 256KB
I/O
/CS3 area BANK 0:
address 04000h ~ 07FFFh 16KB
00000h
00400h
02C00h
04000h
08000h
28000h
30000h
40000h
60000h
80000h
C0000h
FFFFFh
Bank 0
Bank 1
Bank 2
Bank 3
Bank 4
Bank 5
Bank 6
Bank 7
BR1
0
0
1
1
0
1
1
0
BR2
1
1
1
1
0
0
0
0
BR0
1
1
0
1
0
1
0
0
SFR area
Internal RAM area 10KB
Internal reserved area
External I/O
External SRAM 1
128KB
External SRAM 1
256KB
External SRAM 1 32KB External SRAM 1 32KB
External SRAM 1 64KB
External SRAM 1 32KB External SRAM 1 32KB
(Phantom)
(Phantom)
IPL SW
OFF:F-ROM
F-ROM
(Program)
(512KB)
ON:EP-ROM
(Program)
(512KB)
External
SRAM 2
SRAM 2
256KB
(Reserve)
External
SRAM 2
SRAM 2
256KB
(Reserve)
External
SRAM 2
SRAM 2
256KB
(Phantom)
External
SRAM 2
SRAM 2
256KB
(Phantom)
Flash ROM
Program 256KB
Flash ROM
(CG Data)
(Reserve)
Not used
512KB
Flash ROM
(CG Data)
(Reserve)
Not used
512KB
Not used bank 4, 5 and bank 6, 7
Even if the bank is changed, the
same address can be accssed.
same address can be accssed.
CS3
/CS2
/CS1
/RAMCS1
/CS0
/RAMCS2
Caution: The printer handler and so on should be
stored to C0000h or later.
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